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公开(公告)号：US10114392B2
公开(公告)日：2018-10-30
申请号：US15800743
申请日：2017-11-01
Inventor： Eric J. King , Christian Larsen , Aaron J. Brennan
Abstract: A method of increasing a multiplication ratio of a charge pump, the multiplication ratio defining a relationship between an output voltage of the charge pump and an input voltage of the charge pump, comprising: analyzing a first efficiency of the charge pump when the multiplication ratio is at a first ratio, calculating a second efficiency of the charge pump when the multiplication ratio is a second ratio lesser than the first ratio, and based on the first efficiency and the second efficiency, determining at least one of a target output power and a target output voltage at which to change the multiplication ratio from the second ratio to the first ratio.
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公开(公告)号：US10111001B2
公开(公告)日：2018-10-23
申请号：US15708890
申请日：2017-09-19
Inventor： Vitaliy Sapozhnykov , Henry Chen
Abstract: A crosstalk canceller for reducing acoustic crosstalk at a time of audio playback is derived by forming a channel frequency response for a nominated playback geometry, and decomposing the channel frequency response to derive a decomposition element such as a singular value decomposition matrix. A value of the decomposition element, such as the smallest singular value, is then adjusted to reduce spectral coloration, and filter coefficients of a crosstalk cancellation filter are derived from the adjusted decomposition element.
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公开(公告)号：US10091579B2
公开(公告)日：2018-10-02
申请号：US15312874
申请日：2015-05-26
Inventor： Henry Chen
Abstract: Wind noise reduction in microphone signals. A first microphone signal is obtained from a first omnidirectional microphone and, contemporaneously, a second microphone signal is obtained from a second omnidirectional microphone. The first and second microphone signals are mixed to produce an output signal. Mixing involves weighting the first and second microphone signals by respective first and second signal weights to produce respective first and second weighted microphone signals, and summing the first and second weighted microphone signals together to produce the output signal. The first and second signal weights are calculated to minimize the power of the output signal.
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公开(公告)号：US10085094B2
公开(公告)日：2018-09-25
申请号：US15636121
申请日：2017-06-28
Inventor： Scott Lyall Cargill , Colin Robert Jenkins , Euan James Boyd
CPC classification number: H04R19/04 , B81B3/0072 , B81B2201/0257 , B81B2201/0264 , B81B2203/0127 , B81B2203/0315 , B81C1/00666 , H04R7/04 , H04R7/18 , H04R17/02 , H04R19/005 , H04R2201/003
Abstract: A MEMS transducer structure comprises a substrate comprising a cavity. A membrane layer is supported relative to the substrate to provide a flexible membrane. A peripheral edge of the cavity defines at least one perimeter region that is convex with reference to the center of the cavity. The peripheral edge of the cavity may further define at least one perimeter region that is concave with reference to the center of the cavity.
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公开(公告)号：US10063218B2
公开(公告)日：2018-08-28
申请号：US14270296
申请日：2014-05-05
Applicant: Cirrus Logic, Inc.
Inventor： Dan Shen
IPC: H03F99/00 , H03K3/037 , H03F3/217 , H03K3/3565
CPC classification number: H03K3/0377 , H03F3/217 , H03F3/2171 , H03F3/2173 , H03K3/3565
Abstract: Voltage level shifting in a switching output stage is presented. The circuit may include a switching output stage configured to receive an analog input signal and provide a responsive digital output signal, the switching output stage having a first switching device coupled to a first supply voltage and a second switching device coupled to a second supply voltage, the first switching device and the second switching device being coupled to a common output node. The apparatus may also include a voltage level shifter circuit coupled to a switching control node of the second switching device, the voltage level shifter configured to shift a voltage level at the switching control node of the second switching device relative to the analog input signal, wherein the digital output signal at the common output node transitions as the input signal reaches a predetermined threshold value.
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Patent Agency Ranking
公开(公告)号：US10021485B2
公开(公告)日：2018-07-10
申请号：US15342846
申请日：2016-11-03
Inventor： Jeffrey Allen May , Firas Azrai
CPC classification number: H04R3/04 , H03G3/007 , H03G3/3005 , H03G7/002 , H03G7/007 , H04R29/001
Abstract: A method may include receiving information indicative of an amplitude of an audio output signal, receiving information indicative of a predicted voltage of a power supply of a signal path having an audio input for receiving an audio input signal and an audio output for generating the audio output signal based on the audio input signal, predicting from the information indicative of the amplitude of the audio output signal and the information indicative of the predicted voltage of the power supply whether the audio output signal will exceed an available supply voltage generated by the power supply, and responsive to determining the audio output signal will exceed the available supply voltage generated by the power supply, attenuating the audio input signal or a derivative thereof to reduce the amplitude of the audio output signal such that the audio output signal does not exceed the available supply voltage of the power supply.
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公开(公告)号：US09986351B2
公开(公告)日：2018-05-29
申请号：US15050139
申请日：2016-02-22
Inventor： Shatam Agarwal , Anand Ilango , Alvin C. Storvik , Cory Jay Peterson , Daniel John Allen , Aniruddha Satoskar
CPC classification number: H04R29/001 , H03F3/181 , H03F2200/03 , H03F2200/222 , H03M1/46 , H03M1/66
Abstract: A portable audio device may be configured to measure load characteristics of headphones. The device may measure direct current (DC) and/or alternating current (AC) characteristics of the load. These characteristics may be measured by an audio component, such as an audio codec chip or integrated circuit (IC) controller, and reported to software or firmware executing on a processor coupled to the audio component. The software or firmware may then take action based on the measured load characteristics. For example, the load characteristics may be compared to a database of headphones and their known load characteristics to determine a particular headphone model or type of headphone attached to the audio output. The processor may then apply an appropriate equalization curve.
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公开(公告)号：US09959856B2
公开(公告)日：2018-05-01
申请号：US14739289
申请日：2015-06-15
Inventor： Aniruddha Satoskar , Daniel J. Allen , Edmund Mark Schneider
CPC classification number: G10K11/175 , H03M1/002 , H03M1/0631 , H03M1/188 , H03M3/466 , H04H20/10 , H04R3/00
Abstract: In accordance with embodiments of the present disclosure, a processing system may include multiple selectable processing paths for processing an analog signal in order to reduce noise, increase dynamic range, and mask audio artifacts associated with a change in noise floor. Techniques are employed to transition between processing paths and calibrate operational parameters of the two paths in order to reduce or eliminate artifacts caused by switching between processing paths.
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公开(公告)号：US09946672B2
公开(公告)日：2018-04-17
申请号：US14838888
申请日：2015-08-28
Inventor： Willem Zwart
CPC classification number: G06F13/36 , G06F13/405 , G06F13/4068 , G06F13/4256
Abstract: A method of transferring control data between a master device and a slave device over a path including at least one intermediate device, such that the path includes multiple path segments between successive pairs of devices. Data is transferred on each path segment in a plurality of frames of data, wherein the frames are synchronized between said path segments. The control data is transmitted in command slots of each frame, wherein a command slot comprises a set of control data bit slots, and wherein a control data bit slot is a time window associated with the transfer of a single control data bit over a single path segment between the devices on the path segment. The control data bit slots for each command slot are subdivided into: a first set of bit slots reserved for the transfer of control data in the direction from the master device to the slave device, and a second set of bit slots reserved for the transfer of control data either in the direction from the master device to the slave device or in the direction from the slave device to the master device. The time positions of the command slots on each path segment are offset from the positions of the command slots on each respective adjacent path segment by at least one control data bit slot.
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100.发明授权公开(公告)号：US09929147B2
公开(公告)日：2018-03-27
申请号：US15144657
申请日：2016-05-02
Inventor： Zhonghai Shi , Marc L. Tarabbia
CPC classification number: H01L27/0629 , H01L21/823431 , H01L27/0805 , H01L28/86 , H01L28/90 , H01L29/66795 , H01L29/7851
Abstract: A vertical structure may be manufactured in a substrate of an integrated circuit, and that vertical structure used to form a high density capacitance for the integrated circuit. These thin vertical structures can be configured to operate as an insulator in a capacitor. The vertical structures may be manufactured using three-dimensional semiconductor manufacturing technology, such as FinFET (fin field effect transistor) technology and manufacturing processes. The capacitors based on thin vertical structures may be integrated with other circuitry that can utilize the thin vertical structures, such as FinFET transistors.
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